Monday, 1 September 2008 - Seasonal Climate Summary for Tasmania - Product code IDCKGC27R0

Tasmania in winter 2008: below-average rain again

Despite several rain (and snow) events during the three months, winter 2008 overall was another season of below-average rain for Tasmania, continuing a pattern that extends back to at least 2006. Days were mostly warmer than average, but nights were mostly cooler than average.

Separate summaries are available for the three months of winter: June, July and August 2008. An archive of previous seasonal summaries for Tasmania is also available, as are summaries for other states and many other climate summaries and diagnostics.

Details

Continuing dry: There were several rainfall events through winter, especially in June, but overall it was another dry season, coming on top of the dry winters of 2006 and 2007. There were a few pockets with winter totals in the average band, notably in the far northwest, King Island, the upper Derwent Valley and the far northeast. The west coastal strip and the northeast were markedly drier than average, with sites such as Fingal, Swansea and St Marys receiving less than 100 mm for the whole season. 

Daytime temperatures near average: Most days in June were warmer than usual but that the pattern gradually reversed as the season progressed and by August most days were cooler than usual - until the last few days. Over the whole winter period, average day time temperatures were generally within half a degree of average: a little warmer than usual in most areas but a little cooler in some inland locations.

Some very cold nights: There were several very cold nights, especially in July and August, but nights were generally mild through June. Overall there were more cool than warm minima, with some very cold nights in each month, so winter night time temperatures were mostly around half a degree below average. The exceptions were the northwest coast and far south, where minima were slightly above normal. The coldest night was −10.2°C at Liawenee on 4 July. Flinders Island and Scottsdale had their lowest winter mean daily minimum temperature for several years.

Changing weather patterns: Westerly winds dominated in June, but in July there was a distinct lack of westerlies although a number of low pressure systems passed near the state. August saw a return to mostly westerlies, but with a southerly influence. There were several snow events during winter, with falls settling below 500 metres on at least six occasions; one of the "snowiest" winters for many years.

Further information

Ian Barnes-Keoghan
Meteorologist
Tasmania and Antarctica Climate Services Centre
Bureau of Meteorology
Phone (03) 6221 2043
Email climate.tas@bom.gov.au

Extremes

Hottest day
Highest temperature
19.7°C at Scamander on 27 Jun
Warmest days on average
Highest mean daily maximum temperature
14.6°C at Bicheno (Council Depot)
Coolest days on average
Lowest mean daily maximum temperature
3.3°C at Mount Wellington
Coldest day
Lowest daily maximum temperature
−2.6°C at Mount Wellington on 21 Jul
Coldest night
Lowest temperature
−10.2°C at Liawenee on 4 Jul
Coolest nights on average
Lowest mean daily minimum temperature
−2.1°C at Liawenee
Warmest nights on average
Highest mean daily minimum temperature
9.1°C at Hogan Island
Warmest night
Highest daily minimum temperature
13.4°C at Swan Island on 11 Jun
Wettest overall
Highest total rainfall
765.6 mm at Cradle Valley (Waldheim)
Driest overall
Lowest total rainfall
63.0 mm at Mount Morriston (Macquarie River)
Wettest day
Highest daily rainfall
82.6 mm at Cradle Valley (Waldheim) on 27 Jun
Highest wind gust
180 km/h at Hogan Island on 26 Jun

Records

Record lowest total winter rainfall
Total rainfall
for winter 2008 (mm)
Previous lowest
for winter
Years of
record
Normal for
winter
Cape Sorell 240.2 277.7 in 1934 84 449.6

Lowest total winter rainfall for at least 20 years
Total rainfall
for winter 2008 (mm)
Most recent lower
for winter
Years since
lower
Normal for
winter
Lake Leake (Elizabeth River) 98.0 95.8 in 1908 99 240.8



Lowest winter mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for winter 2008 (°C)
Most recent lower
for winter
Years since
lower
Normal for
winter
Flinders Island Airport 5.4 5.3 in 1987 21 6.6
Scottsdale (West Minstone Road) 3.5 2.3 in 1978 21 3.9
(There is a marked gap in Scottsdale's winter temperature record from 1979 to 1987)

Summaries

In this table, key sites have been highlighted to make them easier to find. This table is very wide and may not fit if printed.


Summary statistics for winter 2008
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2008
Diff
from
normal
Highest for
winter
2008
Mean for
winter
2008
Diff
from
normal
Lowest for
winter
2008
Total for
winter
2008
Normal
for
winter
Rank of
winter
2008
Fraction of
winter
normal
Northern (district 91)
Bridport 13.7 +0.1 18.1 4 Jun 5.8 0.0 0.9 4 Jul 207.4 239.0 average 87%
Burnie 13.5 +0.4 17.2 18 Jun 7.2 +1.0 2.2 4 Jul 243.2 338.2 low 72%
Cape Grim BAPS 12.8 +0.1 17.0 5 Jun 8.3 −0.2 3.3 29 Jul 312.8 270.4 average 116%
Cressy Research Station 12.2 −0.3 17.3 3 Jun 1.4 −0.4 −5.6 4 Jul 118.2
Devonport Airport 13.2 +0.2 17.0 4 Jun 5.1 +0.2 −1.3 22 Aug 191.5 263.7 low 73%
Launceston 13.4 +0.3 17.6 30 Aug 2.8 0.0 −2.4 4 Jul 151.0 224.4 low 67%
Launceston Airport 12.2   16.7 30 Aug 2.3   −3.5 13 Aug 121.8
Launceston Airport Comparison 11.7 +0.2 15.7 30 Aug 2.6 −0.1 −3.3 4 Jul
Low Head 13.1 0.0 16.9 4 Jun 6.9 −0.2 2.1 4 Jul 205.2 213.3 average 96%
Luncheon Hill 10.7 −0.3 16.3 28 Aug 4.9 −0.3 −1.3 22 Aug 447.0 526.3 low 85%
Marrawah 12.7 +0.2 17.0 5 Jun 7.1 +0.1 2.3 22 Aug 363.0 389.7 average 93%
Scottsdale 12.3 0.0 17.5 4 Jun 3.5 −0.4 −2.4 13 Aug 227.4 342.2 very low 66%
Sheffield School Farm 11.1 −0.2 16.3 4 Jun 3.6 −0.1 −2.3 29 Jul
Smithton Aerodrome 13.6 +0.1 17.6 5 Jun 4.9 −0.1 −2.6 29 Jul 306.0 317.4 average 96%
Wynyard Airport 13.4 +0.4 17.3 19 Jun 4.1 +0.3 −2.4 4 Jul 367.9 352.5 average 104%
East Coast (district 92)
Bicheno 14.6 +0.2 18.9 31 Aug 6.4 0.0 1.9 5 Jul 148.0 162.7 average 91%
Eddystone Point 14.4 +1.0 17.7 5 Jun 7.5 +0.1 2.2 13 Aug 173.8 222.6 low 78%
Fingal 12.7 0.0 16.7 28 Aug 0.7 −0.1 −5.6 23 Aug 72.6 178.4 very low 41%
Friendly Beaches 13.7 −0.5 19.0 31 Aug 5.3 −0.8 −0.5 5 Jul 134.8
Lake Leake 9.0 +0.1 13.6 7 Jul −0.4 −0.9 −7.6 4 Jul 98.0 240.8 very low 41%
Maria Island 12.9   17.3 11 Jun 7.2   2.5 22 Jul 93.0
Orford 13.2 −0.3 18.5 11 Jun 3.9 0.0 −1.6 5 Jul 102.2 169.1 low 60%
Scamander 14.1 −0.3 19.7 27 Jun 5.2 +0.1 −0.2 13 Aug 120.4 163.2 average 74%
St Helens Aerodrome 13.7   17.6 27 Jun 4.7   −0.3 4 Jul 120.2
Swan Island 13.5   16.8 9 Jun 8.3   3.5 23 Aug 194.4
Swansea Post Office 13.7 −0.1 19.5 31 Aug 3.8 −0.3 −1.3 5 Jul 81.0 148.4 low 55%
Midlands (district 93)
Ross 11.9 +0.1 18.1 30 Aug 1.5 −0.3 −4.3 22 Aug 78.6 120.2 low 65%
Southeast (district 94)
Bull Bay 12.5 −0.3 18.0 31 Aug 5.4 −0.6 0.2 13 Aug 140.4 156.6 average 90%
Campania 13.4   18.5 31 Aug 3.3   −2.8 17 Jun 105.6
Cape Bruny 12.3 −0.2 17.0 31 Aug 6.3 −0.5 2.1 13 Aug 198.6 231.6 low 86%
Cape Bruny Lighthouse 11.9 +0.3 16.7 30 Jun 6.4 0.0 3.0 5 Jul 268.2 278.1 average 96%
Dover 12.5 −0.1 17.8 29 Jun 2.7 −1.1 −2.1 25 Jul 205.8 252.5 average 82%
Geeveston 12.3 −0.2 17.4 30 Jun 1.7 −0.7 −3.9 5 Jul 238.2 261.6 average 91%
Grove 12.7 +0.4 18.5 29 Jun 1.6 −0.7 −3.9 5 Jul 165.6 209.1 average 79%
Grove 12.5   18.5 29 Jun 1.1   −4.5 4 Jul 168.6
Hobart 13.1 +0.9 18.1 29 Jun 4.9 −0.1 0.3 30 Jul 123.8 159.1 average 78%
Hobart Airport 13.3 +0.4 19.0 31 Aug 4.2 −0.3 −0.4 17 Jun 77.0 120.4 low 64%
Maatsuyker Island Lighthouse 11.4 +0.2 16.8 30 Aug 7.2 +0.4 1.0 13 Aug 243.6 370.9 low 66%
Melton Mowbray 11.7 −0.3 17.0 18 Jun 1.8 −0.4 −4.0 30 Jul 93.0 109.4 average 85%
Mount Wellington 3.3 +0.5 12.2 17 Jun −1.4 0.0 −7.5 13 Aug
Tasman Island 11.0   14.7 31 Aug 6.5   0.4 13 Aug 209.0
Tunnack Fire Station 9.9 −0.1 15.3 31 Aug 1.5 −0.5 −3.9 22 Aug 102.4 147.3 low 70%
Derwent Valley (district 95)
Bushy Park 12.3 +0.5 18.6 29 Jun 0.9 −1.1 −3.8 5 Jul 125.0 150.9 average 83%
Maydena Post Office 10.6 −0.6 16.7 29 Jun 2.0 −0.3 −3.2 22 Aug 282.8 354.9 low 80%
Ouse Fire Station 11.9 −0.6 17.6 29 Jun 1.0 −0.5 −5.1 5 Jul 120.0 160.8 average 75%
Tarraleah Village     13.8 29 Jun 0.9 +0.4 −3.9 5 Jul 324.4 340.8 average 95%
Central Plateau (district 96)
Butlers Gorge 8.3 +0.9 13.4 28 Aug −0.4 −0.3 −7.8 25 Jul 468.0 507.0 average 92%
Lake St Clair National Park 7.8 +0.1 13.4 28 Aug −0.6 −0.7 −6.5 22 Aug 534.8 612.2 average 87%
Liawenee 6.2   12.4 15 Jun −2.1   −10.2 4 Jul 237.2
West Coast (district 97)
Hartz Mountain 6.4 −0.2 14.8 17 Jun 1.3 −0.4 −3.6 13 Aug
Mount Read 3.8 −0.3 11.4 16 Jun 0.2 −0.2 −4.9 22 Aug
Scotts Peak Dam 9.7   17.1 30 Aug 3.1   −1.6 30 Jul 549.4
Strahan Aerodrome 12.8 +0.2 18.0 30 Aug 5.1 −0.3 −1.2 22 Aug 395.6 495.9 low 80%
Strathgordon Village 9.4 −0.1 15.8 30 Aug 3.2 −0.2 −2.0 29 Jul 689.1 772.3 average 89%
Warra 8.9   13.8 30 Jun 2.4   −2.3 30 Jul 481.8
King Island (district 98)
King Island Airport 13.7 +0.2 17.1 9 Jun 7.3 −0.4 0.7 29 Jul 364.2 321.7 high 113%
Flinders Island (district 99)
Flinders Island Airport 14.2 +0.5 18.7 18 Jun 5.4 −1.2 −2.1 23 Aug 148.2 233.2 low 64%
Hogan Island 13.3   16.7 10 Jun 9.1   4.2 22 Jul 169.8

Notes

This statement has been prepared based on information available at 11 am on Monday 1 September 2008. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average ("normal") rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal shows how much rain has fallen this time as a percentage of the long-term mean.

Further information

Ian Barnes-Keoghan
Meteorologist
Tasmania and Antarctica Climate Services Centre
Bureau of Meteorology
Phone (03) 6221 2043
Email climate.tas@bom.gov.au